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EF CodeFirst with Trusted_Connection=True does not create database

Am using EF CodeFirst (Version 6.1.3) with ASP.Net MVC5 / Sql 2014 Express.
It's Entity Framework code first, setup to talk to a local sql server instance using trusted authentication, however database does not get created.
connection string in the Web.config file is
<connectionStrings>
<add name="Ppa" providerName="System.Data.EntityClient" connectionString="Server=localhost;Database=PpaOnline;Trusted_Connection=True;" />
</connectionStrings>
connection string in the App.config file of DAL layer is:
<connectionStrings>
<add name="Ppa" providerName="System.Data.EntityClient" connectionString="Server=localhost;Database=PpaOnline;Trusted_Connection=True;" />
</connectionStrings>
DbContext class is:
public class Db : DbContext
{
static Db()
{
var type = typeof(SqlProviderServices);
if (type == null)
throw new Exception("Do not remove, ensures static reference to System.Data.Entity.SqlServer");
}
public Db()
{
Configuration.LazyLoadingEnabled = false;
}
public DbSet<Company> Companies { get; set; }
public DbSet<User> Users { get; set; }
}
The PpaOnlineConfiguration class is:
public class PpaOnlineConfiguration : DbConfiguration
{
public PpaOnlineConfiguration()
{
SetDefaultConnectionFactory(new SqlConnectionFactory("Server=localhost;Database=PpaOnline;Trusted_Connection=True;"));
}
}
Kindly provide input, as to where am I going wrong.
Thanks,

SQL Server connection error when checking User Roles inside a view

When i put this in my Index.cshtml:
#if (Request.IsAuthenticated && User.IsInRole("Admin"))
{
<li>Gerenciar</li>
}
It throws this error:
An exception of type 'System.Web.HttpException' occurred in System.Web.dll but was not handled in user code
Additional information:
It is not possible to connect with the SQL Server database
Everything is working SQL Server related, it creates the database, create users fine.
I already looked at other questions and there is no answer that helps!
UPDATE 1
I initialize my context using the default Identity 2.0 context:
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext()
: base("DefaultConnection", throwIfV1Schema: false)
{
}
static ApplicationDbContext()
{
// Set the database intializer which is run once during application start
// This seeds the database with admin user credentials and admin role
Database.SetInitializer<ApplicationDbContext>(new ApplicationDbInitializer());
}
public static ApplicationDbContext Create()
{
return new ApplicationDbContext();
}
public System.Data.Entity.DbSet<Gatos.Models.Gato> Gato { get; set; }
public System.Data.Entity.DbSet<Gatos.Models.Formulario> Formulario { get; set; }
public System.Data.Entity.DbSet<Gatos.Models.Imagem> Imagem { get; set; }
}
My connection string:
<add name="DefaultConnection" connectionString="Data Source=Bruno-PC;Initial Catalog=Gatos;User Id = sa; Password = *******" providerName="System.Data.SqlClient" />
Update 2
Now my:
[Authorize(Roles="Admin")]
in my controllers are throwing the same error! This is driving me insane!

Are you using a custom Membership for authentication / Authorization?
As a Shortcut, try removing the following line from your main Web.Config:
<roleManager enabled="true" />
Also, take a look at the following page regarding this issue and the solution:
MVC 5 - RoleManager

Try setting your password in a connection string instead of asterisk (*)
<add name="DefaultConnection" connectionString="Data Source=Bruno-PC;Initial Catalog=Gatos;User Id = sa; Password = your_db_pwd" providerName="System.Data.SqlClient" />

set "Application.StartupPath" in may app.config connectionstring

in App.Config file :
<connectionStrings>
<add name="DB_PhonebookEntities" connectionString="metadata=res://*/MyModel.csdl|res://*/MyModel.ssdl|res://*/MyModel.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.;Initial Catalog=DB_Phonebook;Integrated Security=True;MultipleActiveResultSets=True"" providerName="System.Data.EntityClient" />
</connectionStrings>
in MyModel.Designer.cs file :
namespace SimplePhoneBook
{
public partial class DB_PhonebookEntities : ObjectContext
{
public DB_PhonebookEntities() : base("name=DB_PhonebookEntities", "DB_PhonebookEntities")
{
....
}
public DB_PhonebookEntities(string connectionString): base(connectionString, "DB_PhonebookEntities")
{
....
}
public DB_PhonebookEntities(EntityConnection connection) : base(connection, "DB_PhonebookEntities")
{
....
}
....
}
How can I set Application.StartupPath into my ConnectionString?

I want create "Model" from my database thais on the applicatin path(...\debug\bin\mydatabase.mdf)
and using entities in my model!

Append this to your connection string. This will point to WebApplication1\App_Data. So your mdf file should be in App_Data folder
AttachDBFilename=|DataDirectory|\aspnet-WebApplication1-20141203171438.mdf

The type User was not mapped

I am implementing o-auth in my mvc4 web application. but when I log in using external login (Microsoft)
it gives error in my Account model.
The type User was not mapped.
my Account model is-
public class UsersContext : DbContext
{
public UsersContext()
: base("DefaultConnection") //Exception raise here
{
}
public DbSet<User> UserProfiles { get; set; }
}
User is database generated model class. I have seen link but no help. same exception is raising every time.
my Connection string is-
<add name="DefaultConnection" connectionString="Data Source=URLofWebsite;Initial Catalog=gestest;User ID=Username;Password=Password" providerName="System.Data.SqlClient" />

Get Connection String from Method returning Connection error Object Refrence not Set to the instance of object ??? Asp.net

i am trying to get connection string from method resulting error object reference not set to the instance object my method is,
this method return connection,
namespace InspectionServices.Services
{
public class ConfigManager
{
public static string GetConnectionString()
{
return ConfigurationManager.ConnectionStrings["***"].ConnectionString;
}
}
}
and here i am getting connection by calling method mentioned above,
string connectionString = InspectionServices.Services.ConfigManager.GetConnectionString();
hopes for your suggestion
Thanks in Advance
EDITED:
Appconfig,
<connectionStrings>
<add name="Inspection" connectionString="Data Source=***;Database=***;Integrated Security=SSPI; Persist Security Info=false; Trusted_Connection=Yes;" providerName="System.Data.SqlClient"/>
</connectionStrings>

You mush have web.config entries like this
<connectionStrings>
<add name="name" connectionString="***" />
</connectionStrings>
Only then you can use it in your class.
Some useful links
C# Configuration Manager . ConnectionStrings
http://www.connectionstrings.com/Articles/Show/store-connection-string-in-web-config

namespace InspectionServices.Services
{
public class ConfigManager
{
public static string GetConnectionString()
{
return ConfigurationManager.ConnectionStrings["Inspection"].ConnectionString;
}
}
}