A blog client that retries credentials

BlogClient.cs

using BlazorCosmosWasm.Shared;
using Microsoft.EntityFrameworkCore;
using System;
using System.Net.Http;
using System.Net.Http.Json;
using System.Threading.Tasks;

namespace BlazorCosmosWasm.Client.Data
{
    public class BlogClient : IBlogClient
    {
        private CosmosCredentials Credentials;
        private readonly HttpClient Http;

        public BlogClient(HttpClient client)
        {
            Http = client;
        }

        public async Task<BlogContext> GetDbContextAsync()
        {
            if (Credentials == null)
            {
                await GetCredentialsAsync();
            }

            BlogContext context = null;
            CosmosCredentials getCredentials() => Credentials;

            var options = new DbContextOptionsBuilder<BlogContext>()
                .UseCosmos(getCredentials().EndPoint, getCredentials().Key, BlogContext.DatabaseName,
                opt =>
                 opt.ConnectionMode(Microsoft.Azure.Cosmos.ConnectionMode.Gateway));

            try
            {
                context = new BlogContext(options.Options);
            }
            catch
            {
                // try again with fresh credentials
                await GetCredentialsAsync();
                context = new BlogContext(options.Options);
            }

            return context;
        }

        private async Task GetCredentialsAsync()
        {
            Credentials = await Http.GetFromJsonAsync<CosmosCredentials>("api/Cosmos");
        }
    }
}