## Retrieve `ExpressRetrieveResponse Express.Retrieve(ExpressRetrieveParamsparameters, CancellationTokencancellationToken = default)` **get** `/v1/express/{expressCustomerId}` Retrieves a single customer by its unique customer ID. Returns the complete customer object with name, status, and timestamps. ### Parameters - `ExpressRetrieveParams parameters` - `required string expressCustomerID` Unique Express customer identifier. Format: cus_{32-hex-chars} ### Returns - `class ExpressRetrieveResponse:` An Express customer entity that groups users and studies - `required DateTimeOffset? CreatedAt` Timestamp when the Express customer was created - `required string ExpressCustomerID` Unique Express customer identifier. Format: cus_{32-hex-chars} - `required string ExpressCustomerName` Name of the Express customer - `required Boolean IsActive` Whether the Express customer is currently active - `required DateTimeOffset? UpdatedAt` Timestamp when the Express customer was last updated - `required Long UserCount` Number of users currently in this Express customer - `string CreatedByApiKeyID` UUID of the API key used to create this Express customer, for audit tracking - `string CreatedByUserID` User ID who created this Express customer via dashboard, null if created via API key - `IReadOnlyDictionary Metadata` Custom key-value metadata for the Express customer. Maximum 50 pairs, keys up to 100 chars, values up to 1000 chars ### Example ```csharp ExpressRetrieveParams parameters = new() { ExpressCustomerID = "cus_1234567890abcdef1234567890abcdef" }; var express = await client.Express.Retrieve(parameters); Console.WriteLine(express); ```