API Reference > itwin-client > Authentication > AccessToken AccessToken Class Beta Token issued by DelegationSecureTokenService for API access Methods Name Description constructor(tokenString?: string, startsAt?: Date, expiresAt?: Date, userInfo?: UserInfo): AccessToken Create a new AccessToken given a JWT (JSON Web Token) initFromTokenString(tokenStr: string): void Initialize the jwt field of the current instance of the AccessToken isExpired(buffer: number): boolean returns true if this token has expired setPrefix(prefix: string): void Protected toJSON(): AccessTokenProps toTokenString(includePrefix: IncludePrefix = IncludePrefix.Yes): string Convert this AccessToken to a string that can be passed across the wire fromJson(jsonObj: AccessTokenProps): AccessToken Static Creates a strongly typed AccessToken object from an untyped JSON with the same properties as AccessToken fromTokenString(tokenStr: string): AccessToken Static Create an AccessToken from a string that's typically passed across the wire Properties Name Type Description _prefix Protected string _tokenString Protected string Defined in clients/itwin/src/Token.ts Line 58 Last Updated: 29 November, 2022