feat(auth): Add /token endpoint to request a access token

app/repositories/authorization.go

@@ -1,10 +1,24 @@
 package repositories
 
 import (
+	"time"
+
 	"git.secnex.io/secnex/oauth2-api/database"
 	"git.secnex.io/secnex/oauth2-api/models"
 )
 
+func GetAuthorizationByID(id string) (*models.Authorization, error) {
+	var authorization *models.Authorization
+	if err := database.DB.Where("id = ? AND expires_at > ?", id, time.Now().UTC()).First(&authorization).Error; err != nil {
+		return nil, err
+	}
+	return authorization, nil
+}
+
 func CreateAuthorization(authorization *models.Authorization) error {
 	return database.DB.Create(authorization).Error
 }
+
+func ExpireAuthorization(authorizationID string) error {
+	return database.DB.Model(&models.Authorization{}).Where("id = ?", authorizationID).Update("expires_at", time.Now().UTC()).Error
+}