User model/migrations and gorm init

go.mod

@@ -3,11 +3,13 @@ module Cloudreve
 go 1.12
 
 require (
+	github.com/DATA-DOG/go-sqlmock v1.3.3
 	github.com/gin-gonic/gin v1.4.0
 	github.com/go-playground/locales v0.13.0 // indirect
 	github.com/go-playground/universal-translator v0.16.0 // indirect
 	github.com/jinzhu/gorm v1.9.11
 	github.com/leodido/go-urn v1.2.0 // indirect
+	github.com/pkg/errors v0.8.0
 	github.com/stretchr/testify v1.4.0
 	gopkg.in/go-playground/validator.v8 v8.18.2
 	gopkg.in/go-playground/validator.v9 v9.30.0