djoser默认创建的url：
user-detail 'api/users/%(id)s/'
user-set-username 'api/users/set_username/'
user-set-password 'api/users/set_password/'
user-reset-username-confirm 'api/users/reset_username_confirm/'
user-reset-username 'api/users/reset_username/'
user-reset-password-confirm 'api/users/reset_password_confirm/'
user-reset-password 'api/users/reset_password/'
user-resend-activation 'api/users/resend_activation/'
user-me 'api/users/me/'
user-activation 'api/users/activation/'
user-list 'api/users/'