Feature/improve documentation for public API (#3792)

README.md

@@ -165,6 +165,10 @@ Deprecated: `GET http://localhost:3333/api/v1/auth/anonymous/<INSERT_SECURITY_TO
 
 ### Import Activities
 
+#### Prerequisites
+
+[Bearer Token](#authorization-bearer-token) for authorization
+
 #### Request
 
 `POST http://localhost:3333/api/v1/import`
@@ -230,6 +234,8 @@ Grant access of type _Public_ in the _Access_ tab of _My Ghostfolio_.
 
 `GET http://localhost:3333/api/v1/public/<INSERT_ACCESS_ID>/portfolio`
 
+**Info:** No Bearer Token is required for authorization
+
 #### Response
 
 ##### Success