Add renew refresh token

Signed-off-by: Asai Neko <sugar@sne.moe>

service/auth/refresh.go

@@ -27,7 +27,18 @@ func Refresh(c *gin.Context) {
 		return
 	}
 
+	err = JwtTool.RevokeRefreshToken(req.RefreshToken)
+	if err != nil {
+		c.JSON(500, gin.H{"status": "cannot revoke refresh token"})
+	}
+
+	refresh, err := JwtTool.GenerateRefreshToken()
+	if err != nil {
+		c.JSON(401, gin.H{"status": "cannot generate new refresh token"})
+	}
+
 	c.JSON(200, gin.H{
-		"access_token": access,
+		"access_token":  access,
+		"refresh_token": refresh,
 	})
 }