UpdatedSwagger.cs

services.AddSwaggerGen(x =>
{
    x.SwaggerDoc("v1", new OpenApiInfo{ Title = "Tweetbook API", Version = "v1" });

    x.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
    {
        Description = "JWT Authorization header using the bearer scheme",
        Name = "Authorization",
        In = ParameterLocation.Header,
        Type = SecuritySchemeType.ApiKey
    });
    x.AddSecurityRequirement(new OpenApiSecurityRequirement
    {
        {new OpenApiSecurityScheme{Reference = new OpenApiReference
        {
            Id = "Bearer",
            Type = ReferenceType.SecurityScheme
        }}, new List<string>()} 
    });
});