Pseudo-terminal will not be allocated because stdin is not a terminal

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I am trying to write a shell script that creates some directories on a remote server and then uses scp to copy files from my local machine onto the remote. Here’s what I have so far:

ssh -t user@server<<EOT
DEP_ROOT='/home/matthewr/releases'
datestamp=$(date +%Y%m%d%H%M%S)
REL_DIR=$DEP_ROOT"https://stackoverflow.com/"$datestamp
if [ ! -d "$DEP_ROOT" ]; then
    echo "creating the root directory"
    mkdir $DEP_ROOT
fi
mkdir $REL_DIR
exit
EOT

scp ./dir1 user@server:$REL_DIR
scp ./dir2 user@server:$REL_DIR

Whenever I run it I get this message:

Pseudo-terminal will not be allocated because stdin is not a terminal.

And the script just hangs forever.

My public key is trusted on the server and I can run all the commands outside of the script just fine. Any ideas?

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