Adds Oauth support to plugins

packages/medusa-interfaces/src/index.js

@@ -3,3 +3,4 @@ export { default as BaseModel } from "./base-model"
 export { default as PaymentService } from "./payment-service"
 export { default as FulfillmentService } from "./fulfillment-service"
 export { default as FileService } from "./file-service"
+export { default as OauthService } from "./oauth-service"

packages/medusa-interfaces/src/oauth-service.js

@@ -0,0 +1,25 @@
+import BaseService from "./base-service"
+
+/**
+ * Interface for file connectors
+ * @interface
+ */
+class BaseOauthService extends BaseService {
+  constructor() {
+    super()
+  }
+
+  generateToken() {
+    throw Error("generateToken must be overridden by the child class")
+  }
+
+  refreshToken() {
+    throw Error("refreshToken must be overridden by the child class")
+  }
+
+  destroyToken() {
+    throw Error("destroyToken must be overridden by the child class")
+  }
+}
+
+export default BaseOauthService