this is a really good first commit

lib/something_erlang/accounts/user.ex

@@ -8,20 +8,9 @@ defmodule SomethingErlang.Accounts.User do
     field :hashed_password, :string, redact: true
     field :confirmed_at, :naive_datetime
 
-    field :bbuserid, :string
-    field :bbpassword, :string
-
     timestamps()
   end
 
-  @doc """
-  A user changeset for SA data.
-  """
-  def sadata_changeset(user, attrs, _opts \\ []) do
-    user
-    |> cast(attrs, [:bbuserid, :bbpassword])
-  end
-
   @doc """
   A user changeset for registration.
 
@@ -38,21 +27,26 @@ defmodule SomethingErlang.Accounts.User do
       password field is not desired (like when using this changeset for
       validations on a LiveView form), this option can be set to `false`.
       Defaults to `true`.
+
+    * `:validate_email` - Validates the uniqueness of the email, in case
+      you don't want to validate the uniqueness of the email (like when
+      using this changeset for validations on a LiveView form before
+      submitting the form), this option can be set to `false`.
+      Defaults to `true`.
   """
   def registration_changeset(user, attrs, opts \\ []) do
     user
     |> cast(attrs, [:email, :password])
-    |> validate_email()
+    |> validate_email(opts)
     |> validate_password(opts)
   end
 
-  defp validate_email(changeset) do
+  defp validate_email(changeset, opts) do
     changeset
     |> validate_required([:email])
     |> validate_format(:email, ~r/^[^\s]+@[^\s]+$/, message: "must have the @ sign and no spaces")
     |> validate_length(:email, max: 160)
-    |> unsafe_validate_unique(:email, SomethingErlang.Repo)
-    |> unique_constraint(:email)
+    |> maybe_validate_unique_email(opts)
   end
 
   defp validate_password(changeset, opts) do
@@ -80,15 +74,25 @@ defmodule SomethingErlang.Accounts.User do
     end
   end
 
+  defp maybe_validate_unique_email(changeset, opts) do
+    if Keyword.get(opts, :validate_email, true) do
+      changeset
+      |> unsafe_validate_unique(:email, SomethingErlang.Repo)
+      |> unique_constraint(:email)
+    else
+      changeset
+    end
+  end
+
   @doc """
   A user changeset for changing the email.
 
   It requires the email to change otherwise an error is added.
   """
-  def email_changeset(user, attrs) do
+  def email_changeset(user, attrs, opts \\ []) do
     user
     |> cast(attrs, [:email])
-    |> validate_email()
+    |> validate_email(opts)
     |> case do
       %{changes: %{email: _}} = changeset -> changeset
       %{} = changeset -> add_error(changeset, :email, "did not change")