Move accounts between hosts

[leenpaws]

I created my account on a generic matrix homeserver and later on created my own, I would like to move my account to my newly created homeserver.

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[t3chguy]

You can use https://modular.im/tools/matrix-migration

[turt2live]

Closing in favour of spec discussion: https://github.com/matrix-org/matrix-doc/issues/915