Required. The parent subscriber. Format: projects/{project}/subscribers/{subscriber} The {subscriber} ID is user-settable (4-36 characters, matching /a-z/) if provided during creation, or system-generated otherwise.

Optional. A filter to apply to the list of subscriptions. The filter syntax is described in https://google.aip.dev/160. The filter can be applied to the following fields: - user - data_type The user identifier (e.g., user1 in users/user1) refers to the public health_user_id Example: user = "users/user1" Example: user = "users/user1" OR user = "users/user2" Example: user = "users/user1" AND (data_type = "sleep" OR data_type = "weight")

Optional. The maximum number of subscriptions to return. The service may return fewer than this value. If unspecified, at most 50 subscriptions will be returned. The maximum value is 1000; values above 1000 will be coerced to 1000.

Optional. A page token, received from a previous ListSubscriptions call. Provide this to retrieve the subsequent page. When paginating, all other parameters provided to ListSubscriptions must match the call that provided the page token.