Fix issue #637 with cash accounts.

app/Repositories/Account/AccountRepository.php

@@ -250,6 +250,19 @@ class AccountRepository implements AccountRepositoryInterface
         return $result;
     }
 
+    /**
+     * @return Account
+     */
+    public function getCashAccount(): Account
+    {
+        $type    = AccountType::where('type', AccountType::CASH)->first();
+        $account = Account::firstOrCreateEncrypted(
+            ['user_id' => $this->user->id, 'account_type_id' => $type->id, 'name' => 'Cash account', 'active' => 1]
+        );
+
+        return $account;
+    }
+
     /**
      * Returns the date of the very last transaction in this account.
      *