But now i have another problem:

const loginUser = async (username: string, password: string) => {
        useLogin(username, password)
            .then((res) => {
                if (res) {
                     // process res
               }
           })
           .catch((/*e*/) => toast.warning("Server error occured"));
     };

Property 'then' does not exist on type 'UseQueryResult<unknown, Error>'. Property 'then' does not exist on type 'QueryObserverRefetchErrorResult<unknown, Error>'.

Can you please tell me what's the problem here ?