Wire frontend login to user_login.

Co-authored-by: Cursor <cursoragent@cursor.com>

types/api.ts

@@ -18,6 +18,7 @@ export type UserStatus =
 
 export type User = {
   id: number;
+  user_login: string;
   user_name: string;
   status: UserStatus;
   is_superuser?: boolean;
@@ -31,6 +32,7 @@ export type User = {
 };
 
 export type UserWrite = {
+  user_login: string;
   user_name: string;
   status: UserStatus;
   password?: string;