Add instructions for API Authorization (#1406)

* Add instructions for API Authorization

README.md

@@ -190,20 +190,22 @@ Run `yarn test`
 
 ## Public API
 
-### Import Activities
+### Authorization: Bearer Token
-
-#### Request
 
-`POST http://localhost:3333/api/v1/import`
+Set the header for each request as follows:
-
-#### Authorization: Bearer Token
-
-Set the header as follows:
 
 ```
 "Authorization": "Bearer eyJh..."
 ```
 
+You can get the _Bearer Token_ via `GET http://localhost:3333/api/v1/auth/anonymous/<INSERT_SECURITY_TOKEN_OF_ACCOUNT>` or `curl -s http://localhost:3333/api/v1/auth/anonymous/<INSERT_SECURITY_TOKEN_OF_ACCOUNT>`.
+
+### Import Activities
+
+#### Request
+
+`POST http://localhost:3333/api/v1/import`
+
 #### Body
 
 ```