Add some api integration tests (#18872)

depends on #18871

Added some api integration tests to help testing of #18798.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

models/fixtures/webauthn_credential.yml

@@ -1,5 +1,6 @@
-- id: 1
-  name: "WebAuthn credential"
+-
+  id: 1
+  name: WebAuthn credential
   user_id: 32
   attestation_type: none
   sign_count: 0