Add doc for api "GET /api/users/:id/teams"

docs/sources/http_api/user.md

@@ -226,6 +226,40 @@ Content-Type: application/json
 **Example Response**:
 
 ```http
+HTTP/1.1 200
+Content-Type: application/json
+
+```
+
+## Switch user context for a specified user
+
+`POST /api/users/:userId/using/:organizationId`
+
+Switch user context to the given organization. Requires basic authentication and that the authenticated user is a Grafana Admin.
+
+**Example Request**:
+
+```http
+POST /api/users/7/using/2 HTTP/1.1
+Authorization: Basic YWRtaW46YWRtaW4=
+```
+
+**Example Response**:
+
+```http
+HTTP/1.1 200
+Content-Type: application/json
+
+```
+
+## Switch user context for signed in user
+
+`POST /api/user/using/:organizationId`
+
+Switch user context to the given organization.
+
+**Example Request**:
+
 ```http
 POST /api/user/using/2 HTTP/1.1
 Accept: application/json