Auth: Remove Email Lookup from oauth integrations (#894)

Remove email lookup from oauth integrations

Co-authored-by: ievaVasiljeva <ieva.vasiljeva@grafana.com>

pkg/setting/setting.go

@@ -301,8 +301,9 @@ type Cfg struct {
 	AuthProxySyncTTL          int
 
 	// OAuth
-	OAuthAutoLogin    bool
-	OAuthCookieMaxAge int
+	OAuthAutoLogin                bool
+	OAuthCookieMaxAge             int
+	OAuthAllowInsecureEmailLookup bool
 
 	// JWT Auth
 	JWTAuthEnabled                 bool
@@ -1477,7 +1478,6 @@ func readAuthSettings(iniFile *ini.File, cfg *Cfg) (err error) {
 	auth := iniFile.Section("auth")
 
 	cfg.LoginCookieName = valueAsString(auth, "login_cookie_name", "grafana_session")
-
 	const defaultMaxInactiveLifetime = "7d"
 	maxInactiveDurationVal := valueAsString(auth, "login_maximum_inactive_lifetime_duration", defaultMaxInactiveLifetime)
 	cfg.LoginMaxInactiveLifetime, err = gtime.ParseDuration(maxInactiveDurationVal)
@@ -1485,6 +1485,8 @@ func readAuthSettings(iniFile *ini.File, cfg *Cfg) (err error) {
 		return err
 	}
 
+	cfg.OAuthAllowInsecureEmailLookup = auth.Key("oauth_allow_insecure_email_lookup").MustBool(false)
+
 	const defaultMaxLifetime = "30d"
 	maxLifetimeDurationVal := valueAsString(auth, "login_maximum_lifetime_duration", defaultMaxLifetime)
 	cfg.LoginMaxLifetime, err = gtime.ParseDuration(maxLifetimeDurationVal)