refact and login

src/Yavsc.Server/Models/Relationship/Circle.cs

@@ -14,10 +14,10 @@ namespace Yavsc.Models.Relationship
 
         public bool Public { get; set; }
 
-        [YaRequired]
+        [Required]
         public string Name { get; set; }
         
-        [YaRequired]
+        [Required]
         public string OwnerId { get; set; }
 
         [ForeignKey("OwnerId"),JsonIgnore,NotMapped]

src/Yavsc.Server/Models/Relationship/CircleMember.cs

@@ -9,13 +9,13 @@ namespace Yavsc.Models.Relationship
     public partial class CircleMember
     {
 
-        [YaRequired]
+        [Required]
         public long CircleId { get; set; }
 
         [ForeignKey("CircleId")]
         public virtual Circle Circle { get; set; }
         
-        [YaRequired]
+        [Required]
         public string MemberId { get; set; }
 
         [ForeignKey("MemberId")]

src/Yavsc.Server/Models/Relationship/Tag.cs

@@ -9,7 +9,7 @@ namespace Yavsc.Models.Relationship
     {
         [Key(), DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         public long Id { get; set; }
-        [YaRequired()]
+        [Required()]
         public string Name { get; set; }
     }
 }