deleteContactFromGroup

Removes a contact from a specific group.

This method removes a contact, identified by contactId, from the group specified by groupId. The result is returned as a RainbowResult, indicating success or failure. Upon success, the group's details are updated in the groups property.

Validation Rules:

• groupId must not be null or empty.

• contactId must not be null or empty.

Behavior:

• If groupId or contactId is null or empty, the function returns a Failure with an appropriate error message.

• If the contact is successfully removed, a success is returned.

• If the removal fails, a Failure with error details is returned.

Parameters