public async Task AddConnectionAsync_GivenPlayerNameAndConnectionId_ExpectConnectionBeAdded()
{
//Arrange
var mockVault = Substitute.For <IVault>();
var mockKeyGen = Substitute.For <IKeyGenerator>();
var database = new DatabaseRepository(mockVault, mockKeyGen);
var expectedConnId = "12345";
//Act
await database.AddConnectionAsync("Player-1", "12345");
//Assert
Assert.AreEqual(await database.GetConnectionAsync("Player-1"), expectedConnId);
}