DELETE removes group service member

Given I am authenticated as Customer K0002
And there is a Group Service with service number 123 and has a Phone Extension with extension number 17 as its member
When I send /api/customers/K0002/targets/group-services/123/members/17
Then I should get HTTP/1.1 204 No Content

And Group Service does not have 17 as its member

Cannot remove missing group service member

Given I am authenticated as Customer K0002
And there is a Group Service with service number 123 and has no Phone Extension with extension number 404 as its member
When I send /api/customers/K0002/targets/group-services/123/members/404
Then I should get HTTP/1.1 404 Not Found
with following body

{
  "title": "Group member not found",
  "detail": "Group member with extension number 404 not found",
  "described_by": "http://api.nfon.net/probs/group-member-not-found"
}

Cannot remove group service member fo missing group service

Given I am authenticated as Customer K0002
When I send /api/customers/K0002/targets/group-services/404/members/17
Then I should get HTTP/1.1 404 Not Found
with following body

{
  "title": "Group not found",
  "detail": "Group with serviceNumber 404 not found",
  "described_by": "http://api.nfon.net/probs/group-not-found"
}

Admin cannot remove Group Service Member of missing Customer

Given I am authenticated as Admin
And there is a Group Service with service number 123 and has a Phone Extension with extension number 17 as its member
When I send /api/customers/K0404/targets/group-services/123/members/17
Then I should receive HTTP/1.1 404 Not Found
with following body

{
  "title": "Customer not found",
  "detail": "Customer with identifier K0404 has not been found",
  "described_by": "http://api.nfon.net/probs/customer-not-found"
}

Customer cannot remove Group Service Member of another Customer

And there is a Group Service with service number 123 and has a Phone Extension with extension number 17 as its member
and I am authenticated as Customer K0003
When I send /api/customers/K0002/targets/group-services/123/members/17
Then I should receive HTTP/1.1 403 Forbidden
with following body

{
  "title": "Access forbidden",
  "detail": "Access denied to [Customer] with id [K0002]",
  "described_by": "http://api.nfon.net/probs/invalid-authorization"
}

System Integrator cannot remove Group Service Member of Customer that does not belong to him

Given I am authenticated as System Integrator S0002
When I send /api/customers/K0003/targets/group-services/123/members/17
Then I should receive HTTP/1.1 403 Forbidden
with following body

{
  "title": "Access forbidden",
  "detail": "Access denied to [Customer] with id [K0003]",
  "described_by": "http://api.nfon.net/probs/invalid-authorization"
}

Operator cannot remove Group Service Member of Customer that does not belong to him

Given I am authenticated as Operator C0002
When I send /api/customers/K0003/targets/group-services/123/members/17
Then I should receive HTTP/1.1 403 Forbidden
with following body

{
  "title": "Access forbidden",
  "detail": "Access denied to [Customer] with id [K0003]",
  "described_by": "http://api.nfon.net/probs/invalid-authorization"
}

Service Portal REST API

DELETE /api/customers/{customer-id}/targets/group-services/{service-number}/members/{extension-number}