check the latency introduced by the useAuth requests middleware

[todo]

iol-api-node-wrapper/src/api/api-main.ts

Lines 152 to 157 in 478ec25

	//TODO check the latency introduced by the useAuth requests middleware
	private async useAuth(
	requestConfig: AxiosRequestConfig
	): Promise<AxiosRequestConfig> {
	const newToken = await this.auth.getToken();
	requestConfig.headers["Authorization"] = `bearer ${newToken}`;

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This issue was generated by todo based on a TODO comment in 478ec25 when #13 was merged. cc @Apolofx.