Add auth method to simplify (o)authorization

Change-Id: I318e27375dfece96d0d80f35cd2c2b5bb3b167df
diff --git a/man/KorAPConnection-class.Rd b/man/KorAPConnection-class.Rd
index 9230a42..363f97b 100644
--- a/man/KorAPConnection-class.Rd
+++ b/man/KorAPConnection-class.Rd
@@ -5,10 +5,6 @@
 \alias{KorAPConnection-class}
 \alias{KorAPConnection}
 \alias{initialize,KorAPConnection-method}
-\alias{persistAccessToken,KorAPConnection-method}
-\alias{persistAccessToken}
-\alias{clearAccessToken,KorAPConnection-method}
-\alias{clearAccessToken}
 \alias{apiCall,KorAPConnection-method}
 \alias{apiCall}
 \alias{clearCache,KorAPConnection-method}
@@ -28,10 +24,6 @@
   cache = TRUE
 )
 
-\S4method{persistAccessToken}{KorAPConnection}(kco, accessToken = kco@accessToken)
-
-\S4method{clearAccessToken}{KorAPConnection}(kco)
-
 \S4method{apiCall}{KorAPConnection}(
   kco,
   url,
@@ -57,7 +49,9 @@
 \item{accessToken}{OAuth2 access token. For queries on corpus parts with restricted
 access (e.g. textual queries on IPR protected data), you need to authorize
 your application with an access token.
-How to obtain an access token for the DeReKo KorAP instance is explained in the
+You can obtain an access token using the \code{\link[=auth]{auth()}} method.
+
+More details are explained in the
 \href{https://github.com/KorAP/RKorAPClient#authorization}{authorization section}
 of the RKorAPClient Readme on GitHub.
 
@@ -152,16 +146,4 @@
 kq@collectedMatches$snippet
 }
 
-\dontrun{
-
-kco <- new("KorAPConnection", accessToken="e739u6eOzkwADQPdVChxFg")
-persistAccessToken(kco)
-}
-
-\dontrun{
-
-kco <- new("KorAPConnection")
-clearAccessToken(kco)
-}
-
 }