Whether you want to create a new card, or add an existing one to the correct account, here is what to do:
On iPhone - tap the "+" icon:

On Android - tap the "+" icon:

Or pull down an existing card and then tap the "+button":

Whether you want to create a new card, or add an existing one to the correct account, here is what to do:
On iPhone - tap the "+" icon:
On Android - tap the "+" icon:
Or pull down an existing card and then tap the "+button":