Nginx converts POST request to GET request Laravel

I have a running a Laravel project on Nginx, every thing works fine except when I want to login via the API, I use Passport for authentication, but when I try to login it returns with 404 and a message “The GET method is not supported for this route. Supported methods: POST.”, although it works fine via php artisan serve

Here is my request: URL: http://my_droplet_ip/oauth/token Body:

{
    "username": "user_name",
    "password": "secret",
    "client_id": 3,
    "client_secret": "client_sercret",
    "grant_type": "",
    "scope": "*"
}

The response :

Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException: The GET method is not supported for this route. Supported methods: POST. in file /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/AbstractRouteCollection.php on line 117

#0 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/AbstractRouteCollection.php(103): Illuminate\Routing\AbstractRouteCollection->methodNotAllowed()
#1 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/AbstractRouteCollection.php(40): Illuminate\Routing\AbstractRouteCollection->getRouteForMethods()
#2 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/RouteCollection.php(162): Illuminate\Routing\AbstractRouteCollection->handleMatchedRoute()
#3 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/Router.php(639): Illuminate\Routing\RouteCollection->match()
#4 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/Router.php(628): Illuminate\Routing\Router->findRoute()
#5 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Routing/Router.php(617): Illuminate\Routing\Router->dispatchToRoute()
#6 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(165): Illuminate\Routing\Router->dispatch()
#7 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}()
#8 /home/nginx/zacampus/vendor/barryvdh/laravel-debugbar/src/Middleware/InjectDebugbar.php(60): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#9 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Barryvdh\Debugbar\Middleware\InjectDebugbar->handle()
#10 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php(49): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#11 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\View\Middleware\ShareErrorsFromSession->handle()
#12 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(116): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#13 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(62): Illuminate\Session\Middleware\StartSession->handleStatefulRequest()
#14 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Session\Middleware\StartSession->handle()
#15 /home/nginx/zacampus/vendor/fideloper/proxy/src/TrustProxies.php(57): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#16 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fideloper\Proxy\TrustProxies->handle()
#17 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#18 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle()
#19 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#20 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle()
#21 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#22 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle()
#23 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/CheckForMaintenanceMode.php(63): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#24 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle()
#25 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#26 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(140): Illuminate\Pipeline\Pipeline->then()
#27 /home/nginx/zacampus/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(109): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter()
#28 /home/nginx/zacampus/public/index.php(53): Illuminate\Foundation\Http\Kernel->handle()
#29 {main}

My nginx site-available configuration

server {
	listen 80 default_server;
	listen [::]:80;

	root /home/nginx/zacampus/public;

	add_header X-Frame-Options "SAMEORIGIN";
	add_header X-XSS-Protection "1; mode=block";
	add_header X-Content-Type-Options "nosniff";
	add_header 'Access-Control-Allow-Origin' '*';
	add_header 'Add-Control-Allow-Methods' 'GET, POST, PUT, PATCH, DELETE, OPTIONS';	
	
	index index.php index.html index.htm;
	charset utf-8;
	
	server_name 134.122.100.243;

	access_log /home/nginx/logs/zacampus_logs/access.log;
	error_log /home/nginx/logs/zacampus_logs/error.log;
	
	
	location / {
		try_files $uri $uri/ $uri/index2.php =404;

		if ($request_method = 'OPTIONS') {
			add_header 'Access-Control-Allow-Origin' '*';
			add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
			add_header 'Access-Control-Allow-Headers' 'DNT, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type, Range';
			add_header 'Access-Control-Max-Age' 1728000;
			add_header 'Content-Type' 'text/plain; charset=utf-8';
			add_header 'Content-Length' 0;
			return 204;
		}
		if ($request_method = 'POST') {
				add_header 'Access-Control-Allow-Origin' '*';
				add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
				add_header 'Access-Control-Allow-Headers' 'DNT, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type, Range';
				add_header 'Access-Control-Expose-Headers' 'Content-Length, Content-Range';
			} 
		if ($request_method = 'GET') {
				add_header 'Access-Control-Allow-Origin' '*';
				add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
				add_header 'Access-Control-Allow-Headers' 'DNT, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Control-Type, Range';
				add_header 'Access-Control-Expose-Headers' 'Content-Length, Content-Range';
		}

			

	}

	location /oauth/token {
		try_files $uri $uri/ = 404;
	}
	location = /favicon.ico { access_log off; log_not_found off; }
	location = /robots.txt { access_log off; log_not_found off; }
	location ~ /\.ht { deny all; }
	error_page 404 /index.php;

	location ~ \.php$ {		
		# With php-fpm (or other unix sockets):
		fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
		fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
		include fastcgi_params;
	}

}

My last line from access.log

196.221.196.151 - - [16/Dec/2020:17:53:46 +0000] "POST /oauth/token HTTP/1.1" 404 195971 "-" "PostmanRuntime/7.26.5"

Note: It works fine when using php artisan serve