The myTarget API has a limit for access tokens that can be provided to the app.
Each API client can have no more than 5 tokens for each user at a time.
For example: if there is a user who is an agency customer and is connected to the automation system, then both the agency API client and the app API client will have 5 tokens each at their disposal.
If there would be an attempt to provide the sixth token, the error "You have reached the limit of tokens for the current account" would appear.
To resolve the issue, please write to our support team at firstname.lastname@example.org