Reorganization of backend + new routes

backend/core/models/users_to_roles.go

@@ -0,0 +1,16 @@
+package models
+
+import (
+	"github.com/google/uuid"
+	"github.com/uptrace/bun"
+)
+
+type UserToRole struct {
+	bun.BaseModel `bun:"table:users_to_roles"`
+
+	UserID uuid.UUID `bun:"user_id,type:uuid,pk"`
+	RoleID uuid.UUID `bun:"type:uuid,pk"`
+
+	User *User `bun:"rel:belongs-to,join:user_id=user_id"`
+	Role *Role `bun:"rel:belongs-to,join:role_id=id"`
+}