[Datafactory] Adding new API to get GitHub access token (#3827)

* [ADF] Bringing back additionalProperties in Activity removed by mistake

* add github token api and exposure control api

* Removing Exposure Control API for now.

* Removing the example for ExposureControl API

* Fixed the example and made the response readonly

* Removing readonly from access token

Author: hvermis

specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json

@@ -395,6 +395,57 @@
         }
       }
     },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DataFactory/factories/{factoryName}/getGitHubAccessToken": {
+      "post": {
+        "tags": [
+          "factories"
+        ],
+        "operationId": "Factories_GetGitHubAccessToken",
+        "x-ms-examples": {
+          "Factories_GetGitHubAccessToken": {
+            "$ref": "./examples/Factories_GetGitHubAccessToken.json"
+          }
+        },
+        "description": "Get GitHub Access Token.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/subscriptionId"
+          },
+          {
+            "$ref": "#/parameters/resourceGroupName"
+          },
+          {
+            "$ref": "#/parameters/factoryName"
+          },
+          {
+            "$ref": "#/parameters/api-version"
+          },
+          {
+            "name": "gitHubAccessTokenRequest",
+            "description": "Get GitHub access token request definition.",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/GitHubAccessTokenRequest"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK.",
+            "schema": {
+              "$ref": "#/definitions/GitHubAccessTokenResponse"
+            }
+          },
+          "default": {
+            "description": "An error response received from the Azure Data Factory service.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
+    },
     "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DataFactory/factories/{factoryName}/integrationRuntimes": {
       "get": {
         "tags": [
@@ -3177,6 +3228,36 @@
         }
       }
     },
+    "GitHubAccessTokenRequest": {
+      "description": "Get GitHub access token request definition.",
+      "properties": {
+        "gitHubAccessCode": {
+          "description": "GitHub access code.",
+          "type": "string"
+        },
+        "gitHubClientId": {
+          "description": "GitHub application client ID.",
+          "type": "string"
+        },
+        "gitHubAccessTokenBaseUrl": {
+            "description": "GitHub access token base URL.",
+            "type": "string"
+        }
+      },
+      "required": [
+        "gitHubAccessCode",
+        "gitHubAccessTokenBaseUrl"
+      ]
+    },
+    "GitHubAccessTokenResponse": {
+      "description": "Get GitHub access token response definition.",
+      "properties": {
+        "gitHubAccessToken": {
+          "description": "GitHub access token.",
+          "type": "string"
+        }
+      }
+    },
     "FactoryProperties": {
       "description": "Factory resource properties.",
       "properties": {

specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/examples/Factories_GetGitHubAccessToken.json

@@ -0,0 +1,27 @@
+{
+  "parameters": {
+    "subscriptionId": "12345678-1234-1234-1234-12345678abc",
+    "resourceGroupName": "exampleResourceGroup",
+    "factoryName": "exampleFactoryName",
+    "gitHubAccessTokenRequest": {
+      "gitHubAccessCode": "some",
+      "gitHubClientId": "some",
+      "gitHubAccessTokenBaseUrl": "some"
+    },
+    "api-version": "2018-06-01"
+  },
+  "responses": {
+    "200": {
+      "headers": {
+        "Date": "Fri, 7 Sep 2018 18:42:45 GMT",
+        "X-Content-Type-Options": "nosniff",
+        "x-ms-ratelimit-remaining-subscription-reads": "1199",
+        "x-ms-request-id": "da630ed9-35e4-41cd-9f93-be14dbcbd099",
+        "x-ms-correlation-request-id": "da630ed9-35e4-41cd-9f93-be14dbcbd099"
+      },
+      "body": {
+        "gitHubAccessToken":"myAccessTokenExample"
+      }
+    }
+  }
+}