[server] Send 5xx if query to validate token fails (#2695)

## Description

## Tests

server/pkg/middleware/auth.go

@@ -1,7 +1,10 @@
 package middleware
 
 import (
+	"database/sql"
+	"errors"
 	"fmt"
+	"github.com/sirupsen/logrus"
 	"net/http"
 	"strconv"
 
@@ -48,6 +51,11 @@ func (m *AuthMiddleware) TokenAuthMiddleware(jwtClaimScope *jwt.ClaimScope) gin.
 				userID, err = m.UserController.ValidateJWTToken(token, *jwtClaimScope)
 			} else {
 				userID, err = m.UserAuthRepo.GetUserIDWithToken(token, app)
+				if err != nil && !errors.Is(err, sql.ErrNoRows) {
+					logrus.Errorf("Failed to validate token: %s", err)
+					c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": "failed to validate token"})
+					return
+				}
 			}
 			if err != nil {
 				c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})