Extend SAML module to have a better support for multiple IdP configurations in conjunction with a different SP configuration

Hi,

Currently, the SAML module does what it is supposed to be doing, making it able to have identity management outside the Mendix app. However, we are getting more and more requests from customers to be able to apply and support multiple Identity providers. For example, the connections with e-IDAS and e-Herkenning are requested more than once and every time the current SAML module has to be edited and extended in order to get it working. And currently, only one sp metadata is supported. And for ADFS a Mendix certificate is used, but a custom key store is also required.

So:
a. Support multiple Identity Providers
b. Extended SAML support, so services like e-IDAS and e-Herkenning can be implemented out-of-the-box.

PS: I can provide you the extra code necessary to make it work, so development can be enhanced.