PLT-2905 fixing upgrade of SSO accounts (#2962)

* PLT-2905 fixing upgrade of SSO accounts

* Fixing multiple Auths mapped to different emails

api/user.go

@@ -535,7 +535,7 @@ func LoginByOAuth(c *Context, w http.ResponseWriter, r *http.Request, service st
 	}
 
 	var user *model.User
-	if result := <-Srv.Store.User().GetByAuth(authData, service); result.Err != nil {
+	if result := <-Srv.Store.User().GetByAuth(&authData, service); result.Err != nil {
 		if result.Err.Id == store.MISSING_AUTH_ACCOUNT_ERROR {
 			return CreateOAuthUser(c, w, r, service, bytes.NewReader(buf.Bytes()), "")
 		}
@@ -1289,7 +1289,8 @@ func updateUser(c *Context, w http.ResponseWriter, r *http.Request) {
 		}
 
 		rusers[0].Password = ""
-		rusers[0].AuthData = ""
+		rusers[0].AuthData = new(string)
+		*rusers[0].AuthData = ""
 		w.Write([]byte(rusers[0].ToJson()))
 	}
 }
@@ -1337,7 +1338,7 @@ func updatePassword(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	user := result.Data.(*model.User)
 
-	if user.AuthData != "" {
+	if user.AuthData != nil && *user.AuthData != "" {
 		c.LogAudit("failed - tried to update user password who was logged in through oauth")
 		c.Err = model.NewLocAppError("updatePassword", "api.user.update_password.oauth.app_error", nil, "auth_service="+user.AuthService)
 		c.Err.StatusCode = http.StatusBadRequest
@@ -1653,7 +1654,7 @@ func sendPasswordReset(c *Context, w http.ResponseWriter, r *http.Request) {
 		user = result.Data.(*model.User)
 	}
 
-	if len(user.AuthData) != 0 {
+	if user.AuthData != nil && len(*user.AuthData) != 0 {
 		c.Err = model.NewLocAppError("sendPasswordReset", "api.user.send_password_reset.sso.app_error", nil, "userId="+user.Id)
 		return
 	}
@@ -1749,7 +1750,7 @@ func ResetPassword(c *Context, userId, newPassword string) *model.AppError {
 		user = result.Data.(*model.User)
 	}
 
-	if len(user.AuthData) != 0 && !c.IsSystemAdmin() {
+	if user.AuthData != nil && len(*user.AuthData) != 0 && !c.IsSystemAdmin() {
 		return model.NewLocAppError("ResetPassword", "api.user.reset_password.sso.app_error", nil, "userId="+user.Id)
 
 	}
@@ -2148,13 +2149,13 @@ func ldapToEmail(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	ldapInterface := einterfaces.GetLdapInterface()
-	if ldapInterface == nil {
+	if ldapInterface == nil || user.AuthData == nil {
 		c.Err = model.NewLocAppError("ldapToEmail", "api.user.ldap_to_email.not_available.app_error", nil, "")
 		c.Err.StatusCode = http.StatusNotImplemented
 		return
 	}
 
-	if err := ldapInterface.CheckPassword(user.AuthData, ldapPassword); err != nil {
+	if err := ldapInterface.CheckPassword(*user.AuthData, ldapPassword); err != nil {
 		c.LogAuditWithUserId(user.Id, "fail - ldap authentication failed")
 		c.Err = err
 		return