Set up or delete HERE HD Live Map credentials
hereHDLMCredentials('setup') opens a dialog box for specifying the
credentials required to access the HERE HD Live Map 
(HERE HDLM) web service. By default, credentials last for the duration of a
MATLAB® session. To save credentials between sessions, in the HERE HD Live Map
Credentials dialog box, select the Save my credentials between MATLAB
sessions check box .
Set up HERE HD Live Map (HERE HDLM) credentials.
Enter a valid Access Key ID and Access Key Secret. You can obtain these credentials by entering into a separate agreement with HERE Technologies. Optionally, select Save my credentials between MATLAB sessions to save your HERE HDLM credentials between MATLAB sessions. Click OK.
Load a driving route, and create a HERE HDLM reader using the route coordinates. The HERE HD Live Map Credentials dialog box does not open because the credentials have already been set up.
data = load('geoSequence.mat'); reader = hereHDLMReader(data.latitude,data.longitude);
Delete the HERE HDLM credentials you previously entered. The next time you use
hereHDLMReader, you must enter your credentials again.
 You need to enter into a separate agreement with HERE in order to gain access to the HDLM services and to get the required credentials (access_key_id and access_key_secret) for using the HERE Service.