Index: iknow-api/Migrations/AppDbContextModelSnapshot.cs
===================================================================
--- iknow-api/Migrations/AppDbContextModelSnapshot.cs	(revision cab02ada65fcd8feda776e5afc86a355f29c7f96)
+++ iknow-api/Migrations/AppDbContextModelSnapshot.cs	(revision b38c39caa5327b5c3dffc7da82ccae5b655835fa)
@@ -51,5 +51,6 @@
                     b.HasKey("Id");
 
-                    b.HasIndex("UserId");
+                    b.HasIndex("UserId")
+                        .IsUnique();
 
                     b.ToTable("ContactInfo");
@@ -75,5 +76,6 @@
                     b.HasKey("Id");
 
-                    b.HasIndex("UserId");
+                    b.HasIndex("UserId")
+                        .IsUnique();
 
                     b.ToTable("EnrollmentInfo");
@@ -99,5 +101,6 @@
                     b.HasKey("Id");
 
-                    b.HasIndex("UserId");
+                    b.HasIndex("UserId")
+                        .IsUnique();
 
                     b.ToTable("HighSchool");
@@ -144,6 +147,6 @@
                 {
                     b.HasOne("iknow_api.Models.User", "User")
-                        .WithMany()
-                        .HasForeignKey("UserId")
+                        .WithOne("ContactInfo")
+                        .HasForeignKey("iknow_api.Models.ContactInfo", "UserId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
@@ -155,6 +158,6 @@
                 {
                     b.HasOne("iknow_api.Models.User", "User")
-                        .WithMany()
-                        .HasForeignKey("UserId")
+                        .WithOne("EnrollmentInfo")
+                        .HasForeignKey("iknow_api.Models.EnrollmentInfo", "UserId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
@@ -166,6 +169,6 @@
                 {
                     b.HasOne("iknow_api.Models.User", "User")
-                        .WithMany()
-                        .HasForeignKey("UserId")
+                        .WithOne("HighSchool")
+                        .HasForeignKey("iknow_api.Models.HighSchool", "UserId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
@@ -173,4 +176,13 @@
                     b.Navigation("User");
                 });
+
+            modelBuilder.Entity("iknow_api.Models.User", b =>
+                {
+                    b.Navigation("ContactInfo");
+
+                    b.Navigation("EnrollmentInfo");
+
+                    b.Navigation("HighSchool");
+                });
 #pragma warning restore 612, 618
         }