feat: relate user and member

test/membership/member_test.exs

@@ -8,7 +8,7 @@ defmodule Mv.Membership.MemberTest do
       last_name: "Doe",
       birth_date: ~D[1990-01-01],
       paid: true,
-      email: "john@example.com",
+      member_email: "john@example.com",
       phone_number: "+49123456789",
       join_date: ~D[2020-01-01],
       exit_date: nil,
@@ -31,16 +31,15 @@ defmodule Mv.Membership.MemberTest do
       assert error_message(errors, :last_name) =~ "must be present"
     end
 
-    test "Email is required" do
-      attrs = Map.put(@valid_attrs, :email, "")
-      assert {:error, %Ash.Error.Invalid{errors: errors}} = Membership.create_member(attrs)
-      assert error_message(errors, :email) =~ "must be present"
+    test "Email is optional" do
+      attrs = Map.delete(@valid_attrs, :member_email)
+      assert {:ok, _member} = Membership.create_member(attrs)
     end
 
-    test "Email must be valid" do
-      attrs = Map.put(@valid_attrs, :email, "test@")
+    test "Email must be valid if provided" do
+      attrs = Map.put(@valid_attrs, :member_email, "test@")
       assert {:error, %Ash.Error.Invalid{errors: errors}} = Membership.create_member(attrs)
-      assert error_message(errors, :email) =~ "is not a valid email"
+      assert error_message(errors, :member_email) =~ "is not a valid email"
     end
 
     test "Birth date is optional but must not be in the future" do