improve auth by using sessions (refresh tokens)

src/models/session.go

@@ -0,0 +1,14 @@
+package models
+
+import (
+	"github.com/google/uuid"
+	"time"
+)
+
+type Session struct {
+	Uuid               uuid.UUID `json:"uuid" gorm:"type:uuid;primaryKey"`
+	UserUuid           uuid.UUID `json:"user_uuid" gorm:"not null"`
+	HashedRefreshToken string    `json:"-" gorm:"not null;unique"`
+	CreatedAt          time.Time `json:"created_at"`
+	Revoked            bool      `json:"revoked"`
+}