services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new Info { Title = "api", Version = "v1" });
    c.AddSecurityDefinition("oauth2", new ApiKeyScheme
    {
        Description = "Standard Authorization header using the Bearer scheme. Example: "bearer {token}"",
        In = "header",
        Name = "Authorization",
        Type = "apiKey"
    });
});