UPDATE: Auth module, User module

pkg/constants/role.go

@@ -0,0 +1,39 @@
+package constants
+
+type Role string
+
+const (
+	ADMIN     Role = "ADMIN"
+	MOD       Role = "MOD"
+	USER      Role = "USER"
+	HISTORIAN Role = "HISTORIAN"
+	BANNED    Role = "BANNED"
+)
+
+func (r Role) String() string {
+	return string(r)
+}
+
+func (r Role) Compare(other Role) bool {
+	return r == other
+}
+
+func (r Role) IsValid() bool {
+	return CheckValidRole(r)
+}
+
+func CheckValidRole(r Role) bool {
+	return r == ADMIN || r == MOD || r == HISTORIAN || r == USER || r == BANNED
+}
+
+
+func ParseRole(s string) (Role, bool) {
+	r := Role(s)
+	if CheckValidRole(r) {
+		return r, true
+	}
+	return "", false
+}
+func (r Role) ToSlice() []Role {
+	return []Role{r}
+}