errcheck issues fixed (#28643)

server/channels/api4/user_local.go

@@ -229,7 +229,9 @@ func localGetUsers(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 localGetUsersByIds(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -269,7 +271,9 @@ func localGetUsersByIds(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 localGetUser(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -435,5 +439,7 @@ func localGetUploadsForUser(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))
+	}
 }