Rgl and vertices on path

How can get list of vertices from start node to end node in rgl?

For example:

require ‘rgl/adjacency’
dg=RGL::DirectedAdjacencyGraph[1,2 ,2,3 ,2,4, 4,5, 6,4, 1,6]

How to do following?
get_path(1,5) should give [1,2,4,5] or [1,6,4,5] or both

Thanks in advance

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