put
https://api-mtls.eu.tispayments.com/rest/api/bam/bank-groups/
Use this endpoint to update the details of an existing Bank group using its identifier. Provide all valid and available Bank group fields in the request body, otherwise, omitted fields will be lost or overwritten with TIS default values. Use this endpoint to add new Bank(s) to the group or remove existing Bank(s) from the Bank group. If removed from the Bank group, the Bank will remain in TIS.