Полный рефакторинг api. Вынесено отдельно api passport

YandexMusic.API/Models/Passport/YMultistepStart.cs

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+using System.Text.Json.Serialization;
+
+namespace YandexMusic.API.Models.Passport;
+
+public class YMultistepStart
+{
+    [JsonPropertyName("track_id")]
+    public string TrackId { get; set; } = string.Empty;
+
+    [JsonPropertyName("can_authorize")]
+    public bool CanAuthorize { get; set; }
+
+    [JsonPropertyName("can_register")]
+    public bool CanRegister { get; set; }
+
+    [JsonPropertyName("is_rfc_2fa_enabled")]
+    public bool IsRfc2faEnabled { get; set; }
+
+    [JsonPropertyName("allowed_account_types")]
+    public List<string> AllowedAccountTypes { get; set; } = new();
+
+    [JsonPropertyName("location_id")]
+    public string LocationId { get; set; } = string.Empty;
+
+    [JsonPropertyName("primary_alias_type")]
+    public int PrimaryAliasType { get; set; }
+
+    [JsonPropertyName("auth_methods")]
+    public List<string> AuthMethods { get; set; } = new();
+
+    [JsonPropertyName("preferred_auth_method")]
+    public string PreferredAuthMethod { get; set; } = string.Empty;
+
+    [JsonPropertyName("csrf_token")]
+    public string CsrfToken { get; set; } = string.Empty;
+
+    [JsonPropertyName("error")]
+    public string? Error { get; set; }
+
+    [JsonPropertyName("errors")]
+    public List<string>? Errors { get; set; }
+}