'How to get only specific fields with Google Directory API users.list

The documentation (https://developers.google.com/admin-sdk/directory/reference/rest/v1/users/list#query-parameters) says you can use customFieldMask to get only specific fields. I cannot figure out the format/structure of this property.

For example, given this for a user:

{
  "kind": "admin#directory#user",
  "id": "...",
  "etag": "\"...\"",
  "primaryEmail": "...",
  "name": {
    "givenName": "...",
    "familyName": "...",
    "fullName": "......"
  },
  "emails": [
    {
      "address": "...",
      "primary": true
    }
  ]
}

I only want to get primaryEmail but I can't figure out how.

google-api google-directory-api

Solution 1:^[1]

The Directory API can't retrieve the 'primaryEmail' with the customFieldMask attribute, with this attribute you can only specify the custom schema names that you create in the Admin console.

Solution 2:^[2]

Send "users(primaryEmail)" in the fields parameter, not in the customFieldMask parameter.

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	Lorena Gomez
Solution 2	AMS

'How to get only specific fields with Google Directory API users.list

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]