The solution (yet I am not sure if this can be accomplished) for this scenario you would like to achieve depends on the way authentication used on the other pages and the way they are used.
It sounds like you may need to use a combination of the following:
- execute a script with the plugin methods
- pass and access data from the different pages (perhaps with making the server to store a cookie or to redirect to another page with parameters and the other page bring it from there or get the cookies)
- pass data from between pages or something similar to the approach shown in this blog post
My assumption that the approach may include also some server modifications of your different pages. The best choice, however, is at the discretion of the developer of the app and the web pages.
In addition, make note for any possible security implications as with any browser requests or redirects, the same security problems as with other browsers apply to the InAppBrowser, especially if you need to make some modifications to the current web pages.
I hope this helps.
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