POST
URL: https://stagingcloud.bmptest.de/api/billing/v1/companies/55f35cd0-8fab-42c2-90ee-e5b6c16e33c2/users/13fa6df2-7ecd-481b-abd8-ecf0ac670af4/paymentInstruments
Content-Type: application/xml
Body:
<paymentInstrument>
    <paymentMethod>KREDITKARTE</paymentMethod>
    <billingAddress>
        <firstName>Demo</firstName>
        <lastName>User</lastName>
        <street1>50 Grove St</street1>
        <city>Somerville</city>
        <country>US</country>
        <state>MA</state>
        <zip>02114</zip>
        <phone>4159991100</phone>
    </billingAddress>
    <creditCard>
        <name>Demo User</name>
        <number>4111111111111111</number>
        <expirationMonth>5</expirationMonth>
        <expirationYear>2017</expirationYear>
        <securityCode>111</securityCode>
        <type>VISA</type>
    </creditCard>
</paymentInstrument>

Response:


    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <paymentInstrument>
    <id>47a5523a-6a53-44e8-bd2e-37ddb6bb8d7d</id>
    <company id="55f35cd0-8fab-42c2-90ee-e5b6c16e33c2" href="https://stagingcloud.bmptest.de/api/account/v1/companies/55f35cd0-8fab-42c2-90ee-e5b6c16e33c2"/>
    <user id="13fa6df2-7ecd-481b-abd8-ecf0ac670af4" href="https://stagingcloud.bmptest.de/api/account/v1/users/13fa6df2-7ecd-481b-abd8-ecf0ac670af4"/>
    <paymentMethod>CREDIT_CARD</paymentMethod>
    <billingAddress>
    <city>Somerville</city>
    <country>US</country>
    <state>MA</state>
    <street1>50 Grove St</street1>
    <zip>02114</zip>
    <firstName>Demo</firstName>
    <lastName>User</lastName>
    <phone>4159991100</phone>
    </billingAddress>
    <creditCard>
    <name>Demo User</name>
    <expirationMonth>5</expirationMonth>
    <expirationYear>2017</expirationYear>
    <type>VISA</type>
    </creditCard>
    <createdOn>2017-03-09T10:06:17.121Z</createdOn>
    <isDefault>false</isDefault>
    <parameters/>
    </paymentInstrument>