Create a new 'send' group.
the name of the group to be created. Up to 25 alpha-numeric characters, and '-' are allowed. The name cannot consist of only digits.
A true boolean if the group is added with success
Specific error codes:
A group with that name already exists (group names are not case-sensitive).
The group name is invalid. Only up to 25 alpha-numeric characters, and '-' are allowed. The name cannot consist of only digits, at least one alpha character or '-' must be present.
error code 404 is reported if the group does not exist; error code 400 is reported if the group name was not specified. See General error codes.