move User.Username to the top of the struct

Username is the canonical user identifier across providers, so move it to the top so that it's more visible

pkg/structs/structs.go

@@ -7,11 +7,11 @@ type UserI interface {
 
 // User is inherited.
 type User struct {
+	Username   string `json:"username",mapstructure:"username"`
 	Name       string `json:"name"`
 	Email      string `json:"email"`
 	CreatedOn  int64  `json:"createdon"`
 	LastUpdate int64  `json:"lastupdate"`
-	Username   string `json:"username",mapstructure:"username"`
 	ID         int    `json:"id",mapstructure:"id"`
 	// jwt.StandardClaims
 }