Your account in Autopin has to be connected with Pinterest. But at some point Pinterest finish the session and you must reconnect it yourself, because Autopin do not store any password.
To do this task you only have to go to https://autopin.co
Click on the dialog where it says “reconnect this account“
Then follow this steps:
When you are reconnected click on Settings:
That’s all! Please use our feedback form if you have any questions regarding your account.