No error when the API fails to change password

[dixonsiu]

When logging in using oidc:google account, it is not clear which account's password will be changed by the "__password" API.

• Personium's me
• Personium's oidc:google (which should not have a password)
• Google's account

[yoh1496]

Please set your account type basic oidc:google, then you can sign in with your gmail account with password.

https://personium.io/docs/ja/apiref/215_Update_Account