checking available login

apiV1LoginAvailable.go

+package main
+
+import (
+	"biukop.com/sfm/loan"
+	"net/http"
+)
+
+func apiV1LoginAvailable(w http.ResponseWriter, r *http.Request, ss *loan.Session) {
+	v := r.URL.Path[len(apiV1Prefix+"login-available/"):] //remove prefix
+	apiV1SendJson(loan.IsLoginAvailable(v), w, r, ss)
+}

apiv1.go

 			{"POST", "user/", apiV1UserPost},
 			{"DELETE", "payIn/", apiV1PayInDelete},
 			{"GET", "user-reward/", apiV1UserReward},
+			{"GET", "login-available/", apiV1LoginAvailable},
 			{"GET", "login", apiV1DumpRequest},
 		}
 	} else { //production
 			{"POST", "user/", apiV1UserPost},
 			{"DELETE", "payIn/", apiV1PayInDelete},
 			{"GET", "user-reward/", apiV1UserReward},
+			{"GET", "login-available/", apiV1LoginAvailable},
 			{"GET", "login", apiV1EmptyResponse},
 		}
 	}