I'm facing a huge problem configuring redirection with Nginx.

My nginx configuration is this;

server {
   listen 80 default_server;
   listen 443 ssl default_server;

   ssl_certificate /var/www/html/.v/example.crt;
   ssl_certificate_key /var/www/html/.v/example_private_key.key;
   return 301 https://www.example.com$request_uri;
}

server {

    listen 443 ssl;
    server_name www.example.com example.com;
    root /var/www/html/mova;
    index index.php index.html index.htm;
    charset UTF-8;
    ssl_certificate /var/www/html/.v/example.crt;
    ssl_certificate_key /var/www/html/.v/example_private_key.key;


    location / {

        try_files $uri/ /index.php?$args;
     }

    location ~ /.v {
          allow all;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
        fastcgi_index index.php;
        include fastcgi.conf;
    }

    location ~* \.(js|css|png|jpg|jpeg|gif|ico|eot|otf|ttf|woff)$ {
       add_header Access-Control-Allow-Origin *;
       access_log off; log_not_found off; expires 30d;
     }

    client_max_body_size 40M;

     location = /robots.txt { access_log off; log_not_found off; }

     location ~ /\. { deny all; access_log off; log_not_found off; }

}

In my WordPress and site address url:

   https://www.example.com

My DNS settings I only created A record for example.com with my vps ip address as the value.

The problem is when I put example.com in the url bar, it will take me to http://example.com, and when I put https://www.example.com, it will take me to https://www.example.com.

Now, what I want is this, I want all url to redirect to https://www.example.com.