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Call it once at startup, then use the returned function in your framework's middleware\u002Fhook system.",[585,586,592],"pre",{"className":587,"code":588,"filename":589,"language":590,"meta":591,"style":591},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createAuthMiddleware } from 'evlog\u002Fbetter-auth'\n\nconst identify = createAuthMiddleware(auth, {\n  exclude: ['\u002Fapi\u002Fauth\u002F**', '\u002Fapi\u002Fpublic\u002F**'],\n  include: ['\u002Fapi\u002F**'],\n  maskEmail: true,\n})\n","server\u002Fmiddleware\u002Fauth-identify.ts","typescript","",[577,593,594,627,634,659,695,716,730],{"__ignoreMap":591},[595,596,599,603,607,611,614,617,620,624],"span",{"class":597,"line":598},"line",1,[595,600,602],{"class":601},"s7zQu","import",[595,604,606],{"class":605},"sMK4o"," {",[595,608,610],{"class":609},"sTEyZ"," createAuthMiddleware",[595,612,613],{"class":605}," }",[595,615,616],{"class":601}," from",[595,618,619],{"class":605}," '",[595,621,623],{"class":622},"sfazB","evlog\u002Fbetter-auth",[595,625,626],{"class":605},"'\n",[595,628,630],{"class":597,"line":629},2,[595,631,633],{"emptyLinePlaceholder":632},true,"\n",[595,635,637,641,644,647,650,653,656],{"class":597,"line":636},3,[595,638,640],{"class":639},"spNyl","const",[595,642,643],{"class":609}," identify ",[595,645,646],{"class":605},"=",[595,648,610],{"class":649},"s2Zo4",[595,651,652],{"class":609},"(auth",[595,654,655],{"class":605},",",[595,657,658],{"class":605}," {\n",[595,660,662,666,669,672,675,678,680,682,684,687,689,692],{"class":597,"line":661},4,[595,663,665],{"class":664},"swJcz","  exclude",[595,667,668],{"class":605},":",[595,670,671],{"class":609}," [",[595,673,674],{"class":605},"'",[595,676,677],{"class":622},"\u002Fapi\u002Fauth\u002F**",[595,679,674],{"class":605},[595,681,655],{"class":605},[595,683,619],{"class":605},[595,685,686],{"class":622},"\u002Fapi\u002Fpublic\u002F**",[595,688,674],{"class":605},[595,690,691],{"class":609},"]",[595,693,694],{"class":605},",\n",[595,696,698,701,703,705,707,710,712,714],{"class":597,"line":697},5,[595,699,700],{"class":664},"  include",[595,702,668],{"class":605},[595,704,671],{"class":609},[595,706,674],{"class":605},[595,708,709],{"class":622},"\u002Fapi\u002F**",[595,711,674],{"class":605},[595,713,691],{"class":609},[595,715,694],{"class":605},[595,717,719,722,724,728],{"class":597,"line":718},6,[595,720,721],{"class":664},"  maskEmail",[595,723,668],{"class":605},[595,725,727],{"class":726},"sfNiH"," true",[595,729,694],{"class":605},[595,731,733,736],{"class":597,"line":732},7,[595,734,735],{"class":605},"}",[595,737,738],{"class":609},")\n",[574,740,741,742,745,746,748,749,752],{},"The function signature is ",[577,743,744],{},"(log, headers, path?) => Promise\u003Cboolean>",". It resolves the session, calls ",[577,747,582],{},", captures timing into ",[577,750,751],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[754,755,341],"h2",{"id":756},"options",[574,758,759,760,767],{},"Inherits all ",[761,762,764,766],"a",{"href":763},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[577,765,582],{}," options",", plus:",[769,770,771,790],"table",{},[772,773,774],"thead",{},[775,776,777,781,784,787],"tr",{},[778,779,780],"th",{},"Option",[778,782,783],{},"Type",[778,785,786],{},"Default",[778,788,789],{},"Description",[791,792,793,814,833,852],"tbody",{},[775,794,795,801,806,811],{},[796,797,798],"td",{},[577,799,800],{},"exclude",[796,802,803],{},[577,804,805],{},"string[]",[796,807,808],{},[577,809,810],{},"['\u002Fapi\u002Fauth\u002F**']",[796,812,813],{},"Route patterns to skip (glob).",[775,815,816,821,825,830],{},[796,817,818],{},[577,819,820],{},"include",[796,822,823],{},[577,824,805],{},[796,826,827],{},[577,828,829],{},"undefined",[796,831,832],{},"If set, only matching routes are resolved.",[775,834,835,840,845,849],{},[796,836,837],{},[577,838,839],{},"onIdentify",[796,841,842],{},[577,843,844],{},"(log, session) => void",[796,846,847],{},[577,848,829],{},[796,850,851],{},"Called after successful identification.",[775,853,854,859,864,868],{},[796,855,856],{},[577,857,858],{},"onAnonymous",[796,860,861],{},[577,862,863],{},"(log) => void",[796,865,866],{},[577,867,829],{},[796,869,870],{},"Called when no session is found.",[754,872,874],{"id":873},"skip-the-routes-that-do-not-need-a-session","Skip the routes that do not need a session",[574,876,877],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[585,879,881],{"className":587,"code":880,"language":590,"meta":591,"style":591},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[577,882,883,899,908,923,936,950,957],{"__ignoreMap":591},[595,884,885,887,889,891,893,895,897],{"class":597,"line":598},[595,886,640],{"class":639},[595,888,643],{"class":609},[595,890,646],{"class":605},[595,892,610],{"class":649},[595,894,652],{"class":609},[595,896,655],{"class":605},[595,898,658],{"class":605},[595,900,901,903,905],{"class":597,"line":629},[595,902,665],{"class":664},[595,904,668],{"class":605},[595,906,907],{"class":609}," [\n",[595,909,910,913,915,917,919],{"class":597,"line":636},[595,911,912],{"class":605},"    '",[595,914,677],{"class":622},[595,916,674],{"class":605},[595,918,655],{"class":605},[595,920,922],{"class":921},"sHwdD","     \u002F\u002F Better Auth itself\n",[595,924,925,927,929,931,933],{"class":597,"line":661},[595,926,912],{"class":605},[595,928,686],{"class":622},[595,930,674],{"class":605},[595,932,655],{"class":605},[595,934,935],{"class":921},"   \u002F\u002F Public endpoints\n",[595,937,938,940,943,945,947],{"class":597,"line":697},[595,939,912],{"class":605},[595,941,942],{"class":622},"\u002Fapi\u002Fhealth",[595,944,674],{"class":605},[595,946,655],{"class":605},[595,948,949],{"class":921},"      \u002F\u002F Health checks\n",[595,951,952,955],{"class":597,"line":718},[595,953,954],{"class":609},"  ]",[595,956,694],{"class":605},[595,958,959,961],{"class":597,"line":732},[595,960,735],{"class":605},[595,962,738],{"class":609},[574,964,965],{},"For high-traffic apps, flip the model and only resolve sessions on routes that need them:",[585,967,969],{"className":587,"code":968,"language":590,"meta":591,"style":591},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[577,970,971,987,1015],{"__ignoreMap":591},[595,972,973,975,977,979,981,983,985],{"class":597,"line":598},[595,974,640],{"class":639},[595,976,643],{"class":609},[595,978,646],{"class":605},[595,980,610],{"class":649},[595,982,652],{"class":609},[595,984,655],{"class":605},[595,986,658],{"class":605},[595,988,989,991,993,995,997,1000,1002,1004,1006,1009,1011,1013],{"class":597,"line":629},[595,990,700],{"class":664},[595,992,668],{"class":605},[595,994,671],{"class":609},[595,996,674],{"class":605},[595,998,999],{"class":622},"\u002Fapi\u002Fdashboard\u002F**",[595,1001,674],{"class":605},[595,1003,655],{"class":605},[595,1005,619],{"class":605},[595,1007,1008],{"class":622},"\u002Fapi\u002Faccount\u002F**",[595,1010,674],{"class":605},[595,1012,691],{"class":609},[595,1014,694],{"class":605},[595,1016,1017,1019],{"class":597,"line":636},[595,1018,735],{"class":605},[595,1020,738],{"class":609},[574,1022,1023,1025,1026,1028,1029,1032,1033,1036,1037,1039,1040,1042],{},[577,1024,820],{}," and ",[577,1027,800],{}," use glob patterns (",[577,1030,1031],{},"*",", ",[577,1034,1035],{},"**","). Provide both if you need granular control, and ",[577,1038,800],{}," wins over ",[577,1041,820],{},".",[754,1044,1046],{"id":1045},"react-to-identification","React to identification",[574,1048,1049,1050,1052],{},"Use ",[577,1051,839],{}," to react to user identification, for example to force-keep logs for premium users via tail sampling:",[585,1054,1056],{"className":587,"code":1055,"filename":589,"language":590,"meta":591,"style":591},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[577,1057,1058,1074,1101,1137,1164,1169,1174,1191,1216,1221],{"__ignoreMap":591},[595,1059,1060,1062,1064,1066,1068,1070,1072],{"class":597,"line":598},[595,1061,640],{"class":639},[595,1063,643],{"class":609},[595,1065,646],{"class":605},[595,1067,610],{"class":649},[595,1069,652],{"class":609},[595,1071,655],{"class":605},[595,1073,658],{"class":605},[595,1075,1076,1079,1081,1084,1088,1090,1093,1096,1099],{"class":597,"line":629},[595,1077,1078],{"class":649},"  onIdentify",[595,1080,668],{"class":605},[595,1082,1083],{"class":605}," (",[595,1085,1087],{"class":1086},"sHdIc","log",[595,1089,655],{"class":605},[595,1091,1092],{"class":1086}," session",[595,1094,1095],{"class":605},")",[595,1097,1098],{"class":639}," =>",[595,1100,658],{"class":605},[595,1102,1103,1106,1108,1111,1113,1116,1118,1121,1124,1126,1129,1131,1134],{"class":597,"line":636},[595,1104,1105],{"class":601},"    if",[595,1107,1083],{"class":664},[595,1109,1110],{"class":609},"session",[595,1112,1042],{"class":605},[595,1114,1115],{"class":609},"user",[595,1117,1042],{"class":605},[595,1119,1120],{"class":609},"plan",[595,1122,1123],{"class":605}," ===",[595,1125,619],{"class":605},[595,1127,1128],{"class":622},"enterprise",[595,1130,674],{"class":605},[595,1132,1133],{"class":664},") ",[595,1135,1136],{"class":605},"{\n",[595,1138,1139,1142,1144,1147,1150,1153,1156,1158,1160,1162],{"class":597,"line":661},[595,1140,1141],{"class":609},"      log",[595,1143,1042],{"class":605},[595,1145,1146],{"class":649},"set",[595,1148,1149],{"class":664},"(",[595,1151,1152],{"class":605},"{",[595,1154,1155],{"class":664}," _forceKeep",[595,1157,668],{"class":605},[595,1159,727],{"class":726},[595,1161,613],{"class":605},[595,1163,738],{"class":664},[595,1165,1166],{"class":597,"line":697},[595,1167,1168],{"class":605},"    }\n",[595,1170,1171],{"class":597,"line":718},[595,1172,1173],{"class":605},"  },\n",[595,1175,1176,1179,1181,1183,1185,1187,1189],{"class":597,"line":732},[595,1177,1178],{"class":649},"  onAnonymous",[595,1180,668],{"class":605},[595,1182,1083],{"class":605},[595,1184,1087],{"class":1086},[595,1186,1095],{"class":605},[595,1188,1098],{"class":639},[595,1190,658],{"class":605},[595,1192,1194,1197,1199,1201,1203,1205,1208,1210,1212,1214],{"class":597,"line":1193},8,[595,1195,1196],{"class":609},"    log",[595,1198,1042],{"class":605},[595,1200,1146],{"class":649},[595,1202,1149],{"class":664},[595,1204,1152],{"class":605},[595,1206,1207],{"class":664}," anonymous",[595,1209,668],{"class":605},[595,1211,727],{"class":726},[595,1213,613],{"class":605},[595,1215,738],{"class":664},[595,1217,1219],{"class":597,"line":1218},9,[595,1220,1173],{"class":605},[595,1222,1224,1226],{"class":597,"line":1223},10,[595,1225,735],{"class":605},[595,1227,738],{"class":609},[574,1229,1230,1231,1233,1234,1236,1237,1239],{},"Hooks fire after the session is resolved and ",[577,1232,582],{}," has set its fields. They run on every request that passes the ",[577,1235,820],{},"\u002F",[577,1238,800],{}," filter, so keep them fast and side-effect-free.",[1241,1242,1243,1248],"tip",{},[574,1244,1245,1246,668],{},"Common patterns for ",[577,1247,839],{},[1249,1250,1251,1255,1258],"ul",{},[1252,1253,1254],"li",{},"Force-keep audit logs for admins or high-value plans.",[1252,1256,1257],{},"Tag the request with feature flags or tenant info loaded from the session.",[1252,1259,1260],{},"Increment a per-user counter for billing.",[754,1262,1264],{"id":1263},"what-happens-when-auth-fails","What happens when auth fails",[574,1266,1267,1268,1271,1272,1025,1274,1277],{},"The middleware catches every error from ",[577,1269,1270],{},"getSession"," and logs nothing, so your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[577,1273,751],{},[577,1275,1276],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1279,1280,1281],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":591,"searchDepth":629,"depth":629,"links":1283},[1284,1285,1286,1287],{"id":756,"depth":629,"text":341},{"id":873,"depth":629,"text":874},{"id":1045,"depth":629,"text":1046},{"id":1263,"depth":629,"text":1264},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1291,1294],{"label":364,"icon":367,"to":365,"color":1292,"variant":1293},"neutral","subtle",{"label":378,"icon":107,"to":379,"color":1292,"variant":1293},{},{"title":369,"icon":372},{"title":569,"description":1288},"W5iPJDKIMXykmBxrqRGnyCbSUGNKZLZjNw0Sw3TEzU0",[1300,1302],{"title":364,"path":365,"stem":366,"description":1301,"icon":367,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":374,"path":375,"stem":376,"description":1303,"icon":325,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1788966795815]