errcheck issues fixed (#28477)

server/channels/api4/oauth.go

@@ -153,7 +153,9 @@ func getOAuthApps(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	w.Write(js)
+	if _, err := w.Write(js); err != nil {
+		c.Logger.Warn("Error while writing response", mlog.Err(err))
+	}
 }
 
 func getOAuthApp(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -308,5 +310,7 @@ func getAuthorizedOAuthApps(c *Context, w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	w.Write(js)
+	if _, err := w.Write(js); err != nil {
+		c.Logger.Warn("Error while writing response", mlog.Err(err))
+	}
 }