First basic code for currency exchange rate routines.

app/User.php

@@ -15,6 +15,7 @@ declare(strict_types=1);
 namespace FireflyIII;
 
 use FireflyIII\Events\RequestedNewPassword;
+use FireflyIII\Models\CurrencyExchangeRate;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\Relations\HasManyThrough;
@@ -119,6 +120,14 @@ class User extends Authenticatable
         return $this->hasMany('FireflyIII\Models\Category');
     }
 
+    /**
+     * @return HasMany
+     */
+    public function currencyExchangeRates(): HasMany
+    {
+        return $this->hasMany(CurrencyExchangeRate::class);
+    }
+
     /**
      * @return HasMany
      */