Fix: Improve logs for insert login credentials

[AlexTraveylan]

Describe the bug
Insert a login don't log error when fail.

To Reproduce
Steps to reproduce the behavior:

1. curl -X POST "http://localhost:3000/api/login/insert?projectName=code-smell" -H "Content-Type: application/json" -d "{"login": {"authentication_url": "https://www.alextraveylan.fr/fr", "username": "toto", "password": "azerty"}}"
2. It log :
   ecosonar_api | [LOGGER] 2024-11-04 09:05:15 info : INSERT LOGIN CREDENTIALS - insert credentials
   ecosonar_api | [LOGGER] 2024-11-04 09:05:35 error : %s
   ecosonar_api | [LOGGER] 2024-11-04 09:05:35 error : [object Object]
   ecosonar_api | [LOGGER] 2024-11-04 09:05:35 error : INSERT LOGIN CREDENTIALS - insert credentials into project code-smell encountered an error
3. curl again
4. It log :
   ecosonar_api | [LOGGER] 2024-11-04 09:14:47 info : INSERT LOGIN CREDENTIALS - insert credentials into project code-smell
   ecosonar_api | [LOGGER] 2024-11-04 09:14:51 info : INSERT LOGIN CREDENTIALS - insert succeeded

Expected behavior
It look i didnt understand how to register login_url but readable error should be usefull, i expect a beter error than "error : %s [object Object]".
And when i retry, i expect an error, the same behavior should log the same error, not a succes log.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: windows
• Browser: chrome
• Version win10 22H2, chrome 130.0.6723.92

Additional context
Maybe fix the doc for this part, i have finally no idea how to register login_url, i thought i have follow the doc but it fail.