Optional
Sometimes /api/v1/accounts/login/ returns bad_password even for valid credentials. In that case you can try /api/v1/web/accounts/login/ajax/.
/api/v1/accounts/login/
bad_password
/api/v1/web/accounts/login/ajax/
'api/v1/accounts/login/' Copy
'api/v1/accounts/login/'
Sometimes
/api/v1/accounts/login/returnsbad_passwordeven for valid credentials. In that case you can try/api/v1/web/accounts/login/ajax/.