anchor.diff:  }
   
   Get a specific set of credentials.
  +<br><br>
  +VALIDATION:<br>
  +<br>
  +{ "id": {"type": "AccountId", “not null”} }
  +{ "id": {"type": "MemberId", “not null”} }
  +<br>
  +<br>
   GET /accounts/{id}/creds/{id}
   > Authorization: MAC id="...", ts="...", nonce="...", mac="..."
   < 200
  
positive.code: }
  
  Create Credentials
  POST /accounts/{id}/creds
  > Content-Type: applicaton/json; charset=utf-8
  > Authorization: MAC id="...", ts="...", nonce="...", mac="..."
  
negative.code: }
  
  Delete a specific set of credentials.
  <br><br>
  VALIDATION:<br>
  <br>
  { "id": {"type": "AccountId", “not null”} }
  { "id": {"type": "MemberId", “not null”} }
  <br>
  <br>
  DELETE /accounts/{id}/creds/{id}
  > Authorization: MAC id="...", ts="...", nonce="...", mac="..."
  {
  