Call to a member function load() on null

Error: Call to a member function load() on null in file /opt/bitnami/apache/htdocs/girls-in-town/app/Http/Controllers/Api/GirlsController.php on line 69 #0 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(46): App\Http\Controllers\Api\GirlsController->showByCity() #1 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Route.php(260): Illuminate\Routing\ControllerDispatcher->dispatch() #2 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Route.php(205): Illuminate\Routing\Route->runController() #3 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Router.php(798): Illuminate\Routing\Route->run() #4 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(141): Illuminate\Routing\Router->Illuminate\Routing\{closure}() #5 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php(50): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #6 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Routing\Middleware\SubstituteBindings->handle() #7 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(126): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #8 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(102): Illuminate\Routing\Middleware\ThrottleRequests->handleRequest() #9 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(54): Illuminate\Routing\Middleware\ThrottleRequests->handleRequestUsingNamedLimiter() #10 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Routing\Middleware\ThrottleRequests->handle() #11 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(116): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #12 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Router.php(799): Illuminate\Pipeline\Pipeline->then() #13 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Router.php(776): Illuminate\Routing\Router->runRouteWithinStack() #14 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Router.php(740): Illuminate\Routing\Router->runRoute() #15 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Routing/Router.php(729): Illuminate\Routing\Router->dispatchToRoute() #16 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(190): Illuminate\Routing\Router->dispatch() #17 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(141): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}() #18 /opt/bitnami/apache/htdocs/girls-in-town/vendor/livewire/livewire/src/DisableBrowserCache.php(19): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #19 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Livewire\DisableBrowserCache->handle() #20 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #21 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle() #22 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull->handle() #23 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #24 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(40): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle() #25 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\TrimStrings->handle() #26 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #27 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle() #28 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(86): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #29 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance->handle() #30 /opt/bitnami/apache/htdocs/girls-in-town/vendor/fruitcake/laravel-cors/src/HandleCors.php(52): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #31 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Fruitcake\Cors\HandleCors->handle() #32 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustProxies.php(39): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #33 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Http\Middleware\TrustProxies->handle() #34 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(116): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}() #35 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(165): Illuminate\Pipeline\Pipeline->then() #36 /opt/bitnami/apache/htdocs/girls-in-town/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(134): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter() #37 /opt/bitnami/apache/htdocs/girls-in-town/public/index.php(52): Illuminate\Foundation\Http\Kernel->handle() #38 {main}