help to setup Ebay API account

I have laravel Ebay API codes that I want to modify to include both Auth'n'Auth and Oauth user token for easy management. Currently the migration table has been formulated, which needs more checking to ensure all parameters are included: Schema::create('ebay_accounts', function (Blueprint $table) { $table->bigIncrements('id'); $table->integer('user_id'); $table->string('user_name'); // seller account $table->string('email')->unique(); $table->string('password'); $table->string('paypal_email')->nullable(); // Developer account information $table->string('api_url')->nullable(); $table->boolean('is_production')->default(true); $table->longText('keyset_name')->nullable(); // Get Ebay's app ID, cert ID, dev ID $table->longText('app_id')->nullable(); $table->longText('dev_id')->nullable(); $table->longText('cert_id')->nullable(); $table->longText('dev_username')->nullable(); // developer username $table->longText('dev_password')->nullable(); // developer password $table->longText('ru_name')->nullable(); $table->longText('oauth2_sign_in_url')->nullable; $table->longText('display_title')->nullable(); $table->longText('app_redirect_url')->nullable(); $table->longText('auth_code'); //We use Access Token for all the api request on eBay service, // valid for 2 hours (or Oauth application token). //We use Refresh Token to regenerate a Access Token. $table->longText('oauth_access_token')->nullable(); $table->longText('oauth_refresh_token')->nullable(); $table->longText('authnauth_access_token')->unique(); $table->text('authnauth_store_name')->unique(); $table->timestamps(); The EbayAPIController and Blade part needs to be completed as currently they are partially done. To ensure that the API can connect successfully to Ebay seller account, I need some help to perform this task asap.