put https://api-mtls.eu.tispayments.com/rest/api/bam/bank-groups/
Replaces a bank group resource with the request payload. All available bank group fields must be described and valid in the request body, otherwise they'll be overwritten with the default values in TIS. Use this endpoint to add new bank(s) to the group or remove existing banks from the bank group. If removed from the bank group, the bank will remain in TIS.